1 /*
2 * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "asm/assembler.hpp"
27 #include "c1/c1_Defs.hpp"
28 #include "c1/c1_MacroAssembler.hpp"
29 #include "c1/c1_Runtime1.hpp"
30 #include "ci/ciUtilities.hpp"
31 #include "gc/shared/cardTable.hpp"
32 #include "gc/shared/cardTableBarrierSet.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "memory/universe.hpp"
35 #include "nativeInst_x86.hpp"
36 #include "oops/compiledICHolder.hpp"
37 #include "oops/oop.inline.hpp"
38 #include "prims/jvmtiExport.hpp"
39 #include "register_x86.hpp"
40 #include "runtime/sharedRuntime.hpp"
41 #include "runtime/signature.hpp"
42 #include "runtime/vframeArray.hpp"
43 #include "utilities/macros.hpp"
44 #include "vmreg_x86.inline.hpp"
45
46 // Implementation of StubAssembler
47
48 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, int args_size) {
49 // setup registers
50 const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread); // is callee-saved register (Visual C++ calling conventions)
51 assert(!(oop_result1->is_valid() || metadata_result->is_valid()) || oop_result1 != metadata_result, "registers must be different");
52 assert(oop_result1 != thread && metadata_result != thread, "registers must be different");
53 assert(args_size >= 0, "illegal args_size");
54 bool align_stack = false;
55 #ifdef _LP64
56 // At a method handle call, the stack may not be properly aligned
57 // when returning with an exception.
58 align_stack = (stub_id() == Runtime1::handle_exception_from_callee_id);
59 #endif
60
61 #ifdef _LP64
62 mov(c_rarg0, thread);
63 set_num_rt_args(0); // Nothing on stack
64 #else
65 set_num_rt_args(1 + args_size);
66
67 // push java thread (becomes first argument of C function)
68 get_thread(thread);
69 push(thread);
70 #endif // _LP64
71
72 int call_offset;
73 if (!align_stack) {
74 set_last_Java_frame(thread, noreg, rbp, NULL);
75 } else {
76 address the_pc = pc();
77 call_offset = offset();
78 set_last_Java_frame(thread, noreg, rbp, the_pc);
79 andptr(rsp, -(StackAlignmentInBytes)); // Align stack
80 }
81
82 // do the call
83 call(RuntimeAddress(entry));
84 if (!align_stack) {
85 call_offset = offset();
86 }
87 // verify callee-saved register
88 #ifdef ASSERT
89 guarantee(thread != rax, "change this code");
90 push(rax);
91 { Label L;
92 get_thread(rax);
93 cmpptr(thread, rax);
94 jcc(Assembler::equal, L);
95 int3();
96 stop("StubAssembler::call_RT: rdi not callee saved?");
97 bind(L);
98 }
99 pop(rax);
100 #endif
101 reset_last_Java_frame(thread, true);
102
103 // discard thread and arguments
104 NOT_LP64(addptr(rsp, num_rt_args()*BytesPerWord));
105
106 // check for pending exceptions
107 { Label L;
108 cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);
109 jcc(Assembler::equal, L);
110 // exception pending => remove activation and forward to exception handler
111 movptr(rax, Address(thread, Thread::pending_exception_offset()));
112 // make sure that the vm_results are cleared
113 if (oop_result1->is_valid()) {
114 movptr(Address(thread, JavaThread::vm_result_offset()), NULL_WORD);
115 }
116 if (metadata_result->is_valid()) {
117 movptr(Address(thread, JavaThread::vm_result_2_offset()), NULL_WORD);
118 }
119 if (frame_size() == no_frame_size) {
120 leave();
121 jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
122 } else if (_stub_id == Runtime1::forward_exception_id) {
123 should_not_reach_here();
124 } else {
125 jump(RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id)));
126 }
127 bind(L);
128 }
129 // get oop results if there are any and reset the values in the thread
130 if (oop_result1->is_valid()) {
131 get_vm_result(oop_result1, thread);
132 }
133 if (metadata_result->is_valid()) {
134 get_vm_result_2(metadata_result, thread);
135 }
136 return call_offset;
137 }
138
139
140 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
141 #ifdef _LP64
142 mov(c_rarg1, arg1);
143 #else
144 push(arg1);
145 #endif // _LP64
146 return call_RT(oop_result1, metadata_result, entry, 1);
147 }
148
149
150 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) {
151 #ifdef _LP64
152 if (c_rarg1 == arg2) {
153 if (c_rarg2 == arg1) {
154 xchgq(arg1, arg2);
155 } else {
156 mov(c_rarg2, arg2);
157 mov(c_rarg1, arg1);
158 }
159 } else {
160 mov(c_rarg1, arg1);
161 mov(c_rarg2, arg2);
162 }
163 #else
164 push(arg2);
165 push(arg1);
166 #endif // _LP64
167 return call_RT(oop_result1, metadata_result, entry, 2);
168 }
169
170
171 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
172 #ifdef _LP64
173 // if there is any conflict use the stack
174 if (arg1 == c_rarg2 || arg1 == c_rarg3 ||
175 arg2 == c_rarg1 || arg1 == c_rarg3 ||
176 arg3 == c_rarg1 || arg1 == c_rarg2) {
177 push(arg3);
178 push(arg2);
179 push(arg1);
180 pop(c_rarg1);
181 pop(c_rarg2);
182 pop(c_rarg3);
183 } else {
184 mov(c_rarg1, arg1);
185 mov(c_rarg2, arg2);
186 mov(c_rarg3, arg3);
187 }
188 #else
189 push(arg3);
190 push(arg2);
191 push(arg1);
192 #endif // _LP64
193 return call_RT(oop_result1, metadata_result, entry, 3);
194 }
195
196
197 // Implementation of StubFrame
198
199 class StubFrame: public StackObj {
200 private:
201 StubAssembler* _sasm;
202
203 public:
204 StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments);
205 void load_argument(int offset_in_words, Register reg);
206
207 ~StubFrame();
208 };
209
210 void StubAssembler::prologue(const char* name, bool must_gc_arguments) {
211 set_info(name, must_gc_arguments);
212 enter();
213 }
214
215 void StubAssembler::epilogue() {
216 leave();
217 ret(0);
218 }
219
220 #define __ _sasm->
221
222 StubFrame::StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments) {
223 _sasm = sasm;
224 __ prologue(name, must_gc_arguments);
225 }
226
227 // load parameters that were stored with LIR_Assembler::store_parameter
228 // Note: offsets for store_parameter and load_argument must match
229 void StubFrame::load_argument(int offset_in_words, Register reg) {
230 __ load_parameter(offset_in_words, reg);
231 }
232
233
234 StubFrame::~StubFrame() {
235 __ epilogue();
236 }
237
238 #undef __
239
240
241 // Implementation of Runtime1
242
243 const int float_regs_as_doubles_size_in_slots = pd_nof_fpu_regs_frame_map * 2;
244 const int xmm_regs_as_doubles_size_in_slots = FrameMap::nof_xmm_regs * 2;
245
246 // Stack layout for saving/restoring all the registers needed during a runtime
247 // call (this includes deoptimization)
248 // Note: note that users of this frame may well have arguments to some runtime
249 // while these values are on the stack. These positions neglect those arguments
250 // but the code in save_live_registers will take the argument count into
251 // account.
252 //
253 #ifdef _LP64
254 #define SLOT2(x) x,
255 #define SLOT_PER_WORD 2
256 #else
257 #define SLOT2(x)
258 #define SLOT_PER_WORD 1
259 #endif // _LP64
260
261 enum reg_save_layout {
262 // 64bit needs to keep stack 16 byte aligned. So we add some alignment dummies to make that
263 // happen and will assert if the stack size we create is misaligned
264 #ifdef _LP64
265 align_dummy_0, align_dummy_1,
266 #endif // _LP64
267 #ifdef _WIN64
268 // Windows always allocates space for it's argument registers (see
269 // frame::arg_reg_save_area_bytes).
270 arg_reg_save_1, arg_reg_save_1H, // 0, 4
271 arg_reg_save_2, arg_reg_save_2H, // 8, 12
272 arg_reg_save_3, arg_reg_save_3H, // 16, 20
273 arg_reg_save_4, arg_reg_save_4H, // 24, 28
274 #endif // _WIN64
275 xmm_regs_as_doubles_off, // 32
276 float_regs_as_doubles_off = xmm_regs_as_doubles_off + xmm_regs_as_doubles_size_in_slots, // 160
277 fpu_state_off = float_regs_as_doubles_off + float_regs_as_doubles_size_in_slots, // 224
278 // fpu_state_end_off is exclusive
279 fpu_state_end_off = fpu_state_off + (FPUStateSizeInWords / SLOT_PER_WORD), // 352
280 marker = fpu_state_end_off, SLOT2(markerH) // 352, 356
281 extra_space_offset, // 360
282 #ifdef _LP64
283 r15_off = extra_space_offset, r15H_off, // 360, 364
284 r14_off, r14H_off, // 368, 372
285 r13_off, r13H_off, // 376, 380
286 r12_off, r12H_off, // 384, 388
287 r11_off, r11H_off, // 392, 396
288 r10_off, r10H_off, // 400, 404
289 r9_off, r9H_off, // 408, 412
290 r8_off, r8H_off, // 416, 420
291 rdi_off, rdiH_off, // 424, 428
292 #else
293 rdi_off = extra_space_offset,
294 #endif // _LP64
295 rsi_off, SLOT2(rsiH_off) // 432, 436
296 rbp_off, SLOT2(rbpH_off) // 440, 444
297 rsp_off, SLOT2(rspH_off) // 448, 452
298 rbx_off, SLOT2(rbxH_off) // 456, 460
299 rdx_off, SLOT2(rdxH_off) // 464, 468
300 rcx_off, SLOT2(rcxH_off) // 472, 476
301 rax_off, SLOT2(raxH_off) // 480, 484
302 saved_rbp_off, SLOT2(saved_rbpH_off) // 488, 492
303 return_off, SLOT2(returnH_off) // 496, 500
304 reg_save_frame_size // As noted: neglects any parameters to runtime // 504
305 };
306
307 // Save off registers which might be killed by calls into the runtime.
308 // Tries to smart of about FP registers. In particular we separate
309 // saving and describing the FPU registers for deoptimization since we
310 // have to save the FPU registers twice if we describe them and on P4
311 // saving FPU registers which don't contain anything appears
312 // expensive. The deopt blob is the only thing which needs to
313 // describe FPU registers. In all other cases it should be sufficient
314 // to simply save their current value.
315
316 static OopMap* generate_oop_map(StubAssembler* sasm, int num_rt_args,
317 bool save_fpu_registers = true) {
318
319 // In 64bit all the args are in regs so there are no additional stack slots
320 LP64_ONLY(num_rt_args = 0);
321 LP64_ONLY(assert((reg_save_frame_size * VMRegImpl::stack_slot_size) % 16 == 0, "must be 16 byte aligned");)
322 int frame_size_in_slots = reg_save_frame_size + num_rt_args; // args + thread
323 sasm->set_frame_size(frame_size_in_slots / VMRegImpl::slots_per_word);
324
325 // record saved value locations in an OopMap
326 // locations are offsets from sp after runtime call; num_rt_args is number of arguments in call, including thread
327 OopMap* map = new OopMap(frame_size_in_slots, 0);
328 map->set_callee_saved(VMRegImpl::stack2reg(rax_off + num_rt_args), rax->as_VMReg());
329 map->set_callee_saved(VMRegImpl::stack2reg(rcx_off + num_rt_args), rcx->as_VMReg());
330 map->set_callee_saved(VMRegImpl::stack2reg(rdx_off + num_rt_args), rdx->as_VMReg());
331 map->set_callee_saved(VMRegImpl::stack2reg(rbx_off + num_rt_args), rbx->as_VMReg());
332 map->set_callee_saved(VMRegImpl::stack2reg(rsi_off + num_rt_args), rsi->as_VMReg());
333 map->set_callee_saved(VMRegImpl::stack2reg(rdi_off + num_rt_args), rdi->as_VMReg());
334 #ifdef _LP64
335 map->set_callee_saved(VMRegImpl::stack2reg(r8_off + num_rt_args), r8->as_VMReg());
336 map->set_callee_saved(VMRegImpl::stack2reg(r9_off + num_rt_args), r9->as_VMReg());
337 map->set_callee_saved(VMRegImpl::stack2reg(r10_off + num_rt_args), r10->as_VMReg());
338 map->set_callee_saved(VMRegImpl::stack2reg(r11_off + num_rt_args), r11->as_VMReg());
339 map->set_callee_saved(VMRegImpl::stack2reg(r12_off + num_rt_args), r12->as_VMReg());
340 map->set_callee_saved(VMRegImpl::stack2reg(r13_off + num_rt_args), r13->as_VMReg());
341 map->set_callee_saved(VMRegImpl::stack2reg(r14_off + num_rt_args), r14->as_VMReg());
342 map->set_callee_saved(VMRegImpl::stack2reg(r15_off + num_rt_args), r15->as_VMReg());
343
344 // This is stupid but needed.
345 map->set_callee_saved(VMRegImpl::stack2reg(raxH_off + num_rt_args), rax->as_VMReg()->next());
346 map->set_callee_saved(VMRegImpl::stack2reg(rcxH_off + num_rt_args), rcx->as_VMReg()->next());
347 map->set_callee_saved(VMRegImpl::stack2reg(rdxH_off + num_rt_args), rdx->as_VMReg()->next());
348 map->set_callee_saved(VMRegImpl::stack2reg(rbxH_off + num_rt_args), rbx->as_VMReg()->next());
349 map->set_callee_saved(VMRegImpl::stack2reg(rsiH_off + num_rt_args), rsi->as_VMReg()->next());
350 map->set_callee_saved(VMRegImpl::stack2reg(rdiH_off + num_rt_args), rdi->as_VMReg()->next());
351
352 map->set_callee_saved(VMRegImpl::stack2reg(r8H_off + num_rt_args), r8->as_VMReg()->next());
353 map->set_callee_saved(VMRegImpl::stack2reg(r9H_off + num_rt_args), r9->as_VMReg()->next());
354 map->set_callee_saved(VMRegImpl::stack2reg(r10H_off + num_rt_args), r10->as_VMReg()->next());
355 map->set_callee_saved(VMRegImpl::stack2reg(r11H_off + num_rt_args), r11->as_VMReg()->next());
356 map->set_callee_saved(VMRegImpl::stack2reg(r12H_off + num_rt_args), r12->as_VMReg()->next());
357 map->set_callee_saved(VMRegImpl::stack2reg(r13H_off + num_rt_args), r13->as_VMReg()->next());
358 map->set_callee_saved(VMRegImpl::stack2reg(r14H_off + num_rt_args), r14->as_VMReg()->next());
359 map->set_callee_saved(VMRegImpl::stack2reg(r15H_off + num_rt_args), r15->as_VMReg()->next());
360 #endif // _LP64
361
362 int xmm_bypass_limit = FrameMap::nof_xmm_regs;
363 #ifdef _LP64
364 if (UseAVX < 3) {
365 xmm_bypass_limit = xmm_bypass_limit / 2;
366 }
367 #endif
368
369 if (save_fpu_registers) {
370 if (UseSSE < 2) {
371 int fpu_off = float_regs_as_doubles_off;
372 for (int n = 0; n < FrameMap::nof_fpu_regs; n++) {
373 VMReg fpu_name_0 = FrameMap::fpu_regname(n);
374 map->set_callee_saved(VMRegImpl::stack2reg(fpu_off + num_rt_args), fpu_name_0);
375 // %%% This is really a waste but we'll keep things as they were for now
376 if (true) {
377 map->set_callee_saved(VMRegImpl::stack2reg(fpu_off + 1 + num_rt_args), fpu_name_0->next());
378 }
379 fpu_off += 2;
380 }
381 assert(fpu_off == fpu_state_off, "incorrect number of fpu stack slots");
382 }
383
384 if (UseSSE >= 2) {
385 int xmm_off = xmm_regs_as_doubles_off;
386 for (int n = 0; n < FrameMap::nof_xmm_regs; n++) {
387 if (n < xmm_bypass_limit) {
388 VMReg xmm_name_0 = as_XMMRegister(n)->as_VMReg();
389 map->set_callee_saved(VMRegImpl::stack2reg(xmm_off + num_rt_args), xmm_name_0);
390 // %%% This is really a waste but we'll keep things as they were for now
391 if (true) {
392 map->set_callee_saved(VMRegImpl::stack2reg(xmm_off + 1 + num_rt_args), xmm_name_0->next());
393 }
394 }
395 xmm_off += 2;
396 }
397 assert(xmm_off == float_regs_as_doubles_off, "incorrect number of xmm registers");
398
399 } else if (UseSSE == 1) {
400 int xmm_off = xmm_regs_as_doubles_off;
401 for (int n = 0; n < FrameMap::nof_fpu_regs; n++) {
402 VMReg xmm_name_0 = as_XMMRegister(n)->as_VMReg();
403 map->set_callee_saved(VMRegImpl::stack2reg(xmm_off + num_rt_args), xmm_name_0);
404 xmm_off += 2;
405 }
406 assert(xmm_off == float_regs_as_doubles_off, "incorrect number of xmm registers");
407 }
408 }
409
410 return map;
411 }
412
413 #define __ this->
414
415 void C1_MacroAssembler::save_live_registers_no_oop_map(bool save_fpu_registers) {
416 __ block_comment("save_live_registers");
417
418 __ pusha(); // integer registers
419
420 // assert(float_regs_as_doubles_off % 2 == 0, "misaligned offset");
421 // assert(xmm_regs_as_doubles_off % 2 == 0, "misaligned offset");
422
423 __ subptr(rsp, extra_space_offset * VMRegImpl::stack_slot_size);
424
425 #ifdef ASSERT
426 __ movptr(Address(rsp, marker * VMRegImpl::stack_slot_size), (int32_t)0xfeedbeef);
427 #endif
428
429 if (save_fpu_registers) {
430 if (UseSSE < 2) {
431 // save FPU stack
432 __ fnsave(Address(rsp, fpu_state_off * VMRegImpl::stack_slot_size));
433 __ fwait();
434
435 #ifdef ASSERT
436 Label ok;
437 __ cmpw(Address(rsp, fpu_state_off * VMRegImpl::stack_slot_size), StubRoutines::fpu_cntrl_wrd_std());
438 __ jccb(Assembler::equal, ok);
439 __ stop("corrupted control word detected");
440 __ bind(ok);
441 #endif
442
443 // Reset the control word to guard against exceptions being unmasked
444 // since fstp_d can cause FPU stack underflow exceptions. Write it
445 // into the on stack copy and then reload that to make sure that the
446 // current and future values are correct.
447 __ movw(Address(rsp, fpu_state_off * VMRegImpl::stack_slot_size), StubRoutines::fpu_cntrl_wrd_std());
448 __ frstor(Address(rsp, fpu_state_off * VMRegImpl::stack_slot_size));
449
450 // Save the FPU registers in de-opt-able form
451 int offset = 0;
452 for (int n = 0; n < FrameMap::nof_fpu_regs; n++) {
453 __ fstp_d(Address(rsp, float_regs_as_doubles_off * VMRegImpl::stack_slot_size + offset));
454 offset += 8;
455 }
456 }
457
458 if (UseSSE >= 2) {
459 // save XMM registers
460 // XMM registers can contain float or double values, but this is not known here,
461 // so always save them as doubles.
462 // note that float values are _not_ converted automatically, so for float values
463 // the second word contains only garbage data.
464 int xmm_bypass_limit = FrameMap::nof_xmm_regs;
465 int offset = 0;
466 #ifdef _LP64
467 if (UseAVX < 3) {
468 xmm_bypass_limit = xmm_bypass_limit / 2;
469 }
470 #endif
471 for (int n = 0; n < xmm_bypass_limit; n++) {
472 XMMRegister xmm_name = as_XMMRegister(n);
473 __ movdbl(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + offset), xmm_name);
474 offset += 8;
475 }
476 } else if (UseSSE == 1) {
477 // save XMM registers as float because double not supported without SSE2(num MMX == num fpu)
478 int offset = 0;
479 for (int n = 0; n < FrameMap::nof_fpu_regs; n++) {
480 XMMRegister xmm_name = as_XMMRegister(n);
481 __ movflt(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + offset), xmm_name);
482 offset += 8;
483 }
484 }
485 }
486
487 // FPU stack must be empty now
488 __ verify_FPU(0, "save_live_registers");
489 }
490
491 #undef __
492 #define __ sasm->
493
494 static void restore_fpu(C1_MacroAssembler* sasm, bool restore_fpu_registers) {
495 if (restore_fpu_registers) {
496 if (UseSSE >= 2) {
497 // restore XMM registers
498 int xmm_bypass_limit = FrameMap::nof_xmm_regs;
499 #ifdef _LP64
500 if (UseAVX < 3) {
501 xmm_bypass_limit = xmm_bypass_limit / 2;
502 }
503 #endif
504 int offset = 0;
505 for (int n = 0; n < xmm_bypass_limit; n++) {
506 XMMRegister xmm_name = as_XMMRegister(n);
507 __ movdbl(xmm_name, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + offset));
508 offset += 8;
509 }
510 } else if (UseSSE == 1) {
511 // restore XMM registers(num MMX == num fpu)
512 int offset = 0;
513 for (int n = 0; n < FrameMap::nof_fpu_regs; n++) {
514 XMMRegister xmm_name = as_XMMRegister(n);
515 __ movflt(xmm_name, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + offset));
516 offset += 8;
517 }
518 }
519
520 if (UseSSE < 2) {
521 __ frstor(Address(rsp, fpu_state_off * VMRegImpl::stack_slot_size));
522 } else {
523 // check that FPU stack is really empty
524 __ verify_FPU(0, "restore_live_registers");
525 }
526
527 } else {
528 // check that FPU stack is really empty
529 __ verify_FPU(0, "restore_live_registers");
530 }
531
532 #ifdef ASSERT
533 {
534 Label ok;
535 __ cmpptr(Address(rsp, marker * VMRegImpl::stack_slot_size), (int32_t)0xfeedbeef);
536 __ jcc(Assembler::equal, ok);
537 __ stop("bad offsets in frame");
538 __ bind(ok);
539 }
540 #endif // ASSERT
541
542 __ addptr(rsp, extra_space_offset * VMRegImpl::stack_slot_size);
543 }
544
545 #undef __
546 #define __ this->
547
548 void C1_MacroAssembler::restore_live_registers(bool restore_fpu_registers) {
549 __ block_comment("restore_live_registers");
550
551 restore_fpu(this, restore_fpu_registers);
552 __ popa();
553 }
554
555
556 void C1_MacroAssembler::restore_live_registers_except_rax(bool restore_fpu_registers) {
557 __ block_comment("restore_live_registers_except_rax");
558
559 restore_fpu(this, restore_fpu_registers);
560
561 #ifdef _LP64
562 __ movptr(r15, Address(rsp, 0));
563 __ movptr(r14, Address(rsp, wordSize));
564 __ movptr(r13, Address(rsp, 2 * wordSize));
565 __ movptr(r12, Address(rsp, 3 * wordSize));
566 __ movptr(r11, Address(rsp, 4 * wordSize));
567 __ movptr(r10, Address(rsp, 5 * wordSize));
568 __ movptr(r9, Address(rsp, 6 * wordSize));
569 __ movptr(r8, Address(rsp, 7 * wordSize));
570 __ movptr(rdi, Address(rsp, 8 * wordSize));
571 __ movptr(rsi, Address(rsp, 9 * wordSize));
572 __ movptr(rbp, Address(rsp, 10 * wordSize));
573 // skip rsp
574 __ movptr(rbx, Address(rsp, 12 * wordSize));
575 __ movptr(rdx, Address(rsp, 13 * wordSize));
576 __ movptr(rcx, Address(rsp, 14 * wordSize));
577
578 __ addptr(rsp, 16 * wordSize);
579 #else
580
581 __ pop(rdi);
582 __ pop(rsi);
583 __ pop(rbp);
584 __ pop(rbx); // skip this value
585 __ pop(rbx);
586 __ pop(rdx);
587 __ pop(rcx);
588 __ addptr(rsp, BytesPerWord);
589 #endif // _LP64
590 }
591
592 #undef __
593 #define __ sasm->
594
595 static OopMap* save_live_registers(StubAssembler* sasm, int num_rt_args,
596 bool save_fpu_registers = true) {
597 __ save_live_registers_no_oop_map(save_fpu_registers);
598 return generate_oop_map(sasm, num_rt_args, save_fpu_registers);
599 }
600
601 static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) {
602 __ restore_live_registers(restore_fpu_registers);
603 }
604
605 static void restore_live_registers_except_rax(StubAssembler* sasm, bool restore_fpu_registers = true) {
606 sasm->restore_live_registers_except_rax(restore_fpu_registers);
607 }
608
609
610 void Runtime1::initialize_pd() {
611 // nothing to do
612 }
613
614
615 // Target: the entry point of the method that creates and posts the exception oop.
616 // has_argument: true if the exception needs arguments (passed on the stack because
617 // registers must be preserved).
618 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
619 // Preserve all registers.
620 int num_rt_args = has_argument ? (2 + 1) : 1;
621 OopMap* oop_map = save_live_registers(sasm, num_rt_args);
622
623 // Now all registers are saved and can be used freely.
624 // Verify that no old value is used accidentally.
625 __ invalidate_registers(true, true, true, true, true, true);
626
627 // Registers used by this stub.
628 const Register temp_reg = rbx;
629
630 // Load arguments for exception that are passed as arguments into the stub.
631 if (has_argument) {
632 #ifdef _LP64
633 __ movptr(c_rarg1, Address(rbp, 2*BytesPerWord));
634 __ movptr(c_rarg2, Address(rbp, 3*BytesPerWord));
635 #else
636 __ movptr(temp_reg, Address(rbp, 3*BytesPerWord));
637 __ push(temp_reg);
638 __ movptr(temp_reg, Address(rbp, 2*BytesPerWord));
639 __ push(temp_reg);
640 #endif // _LP64
641 }
642 int call_offset = __ call_RT(noreg, noreg, target, num_rt_args - 1);
643
644 OopMapSet* oop_maps = new OopMapSet();
645 oop_maps->add_gc_map(call_offset, oop_map);
646
647 __ stop("should not reach here");
648
649 return oop_maps;
650 }
651
652
653 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler *sasm) {
654 __ block_comment("generate_handle_exception");
655
656 // incoming parameters
657 const Register exception_oop = rax;
658 const Register exception_pc = rdx;
659 // other registers used in this stub
660 const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread);
661
662 // Save registers, if required.
663 OopMapSet* oop_maps = new OopMapSet();
664 OopMap* oop_map = NULL;
665 switch (id) {
666 case forward_exception_id:
667 // We're handling an exception in the context of a compiled frame.
668 // The registers have been saved in the standard places. Perform
669 // an exception lookup in the caller and dispatch to the handler
670 // if found. Otherwise unwind and dispatch to the callers
671 // exception handler.
672 oop_map = generate_oop_map(sasm, 1 /*thread*/);
673
674 // load and clear pending exception oop into RAX
675 __ movptr(exception_oop, Address(thread, Thread::pending_exception_offset()));
676 __ movptr(Address(thread, Thread::pending_exception_offset()), NULL_WORD);
677
678 // load issuing PC (the return address for this stub) into rdx
679 __ movptr(exception_pc, Address(rbp, 1*BytesPerWord));
680
681 // make sure that the vm_results are cleared (may be unnecessary)
682 __ movptr(Address(thread, JavaThread::vm_result_offset()), NULL_WORD);
683 __ movptr(Address(thread, JavaThread::vm_result_2_offset()), NULL_WORD);
684 break;
685 case handle_exception_nofpu_id:
686 case handle_exception_id:
687 // At this point all registers MAY be live.
688 oop_map = save_live_registers(sasm, 1 /*thread*/, id != handle_exception_nofpu_id);
689 break;
690 case handle_exception_from_callee_id: {
691 // At this point all registers except exception oop (RAX) and
692 // exception pc (RDX) are dead.
693 const int frame_size = 2 /*BP, return address*/ NOT_LP64(+ 1 /*thread*/) WIN64_ONLY(+ frame::arg_reg_save_area_bytes / BytesPerWord);
694 oop_map = new OopMap(frame_size * VMRegImpl::slots_per_word, 0);
695 sasm->set_frame_size(frame_size);
696 WIN64_ONLY(__ subq(rsp, frame::arg_reg_save_area_bytes));
697 break;
698 }
699 default: ShouldNotReachHere();
700 }
701
702 #ifdef TIERED
703 // C2 can leave the fpu stack dirty
704 if (UseSSE < 2) {
705 __ empty_FPU_stack();
706 }
707 #endif // TIERED
708
709 // verify that only rax, and rdx is valid at this time
710 __ invalidate_registers(false, true, true, false, true, true);
711 // verify that rax, contains a valid exception
712 __ verify_not_null_oop(exception_oop);
713
714 // load address of JavaThread object for thread-local data
715 NOT_LP64(__ get_thread(thread);)
716
717 #ifdef ASSERT
718 // check that fields in JavaThread for exception oop and issuing pc are
719 // empty before writing to them
720 Label oop_empty;
721 __ cmpptr(Address(thread, JavaThread::exception_oop_offset()), (int32_t) NULL_WORD);
722 __ jcc(Assembler::equal, oop_empty);
723 __ stop("exception oop already set");
724 __ bind(oop_empty);
725
726 Label pc_empty;
727 __ cmpptr(Address(thread, JavaThread::exception_pc_offset()), 0);
728 __ jcc(Assembler::equal, pc_empty);
729 __ stop("exception pc already set");
730 __ bind(pc_empty);
731 #endif
732
733 // save exception oop and issuing pc into JavaThread
734 // (exception handler will load it from here)
735 __ movptr(Address(thread, JavaThread::exception_oop_offset()), exception_oop);
736 __ movptr(Address(thread, JavaThread::exception_pc_offset()), exception_pc);
737
738 // patch throwing pc into return address (has bci & oop map)
739 __ movptr(Address(rbp, 1*BytesPerWord), exception_pc);
740
741 // compute the exception handler.
742 // the exception oop and the throwing pc are read from the fields in JavaThread
743 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
744 oop_maps->add_gc_map(call_offset, oop_map);
745
746 // rax: handler address
747 // will be the deopt blob if nmethod was deoptimized while we looked up
748 // handler regardless of whether handler existed in the nmethod.
749
750 // only rax, is valid at this time, all other registers have been destroyed by the runtime call
751 __ invalidate_registers(false, true, true, true, true, true);
752
753 // patch the return address, this stub will directly return to the exception handler
754 __ movptr(Address(rbp, 1*BytesPerWord), rax);
755
756 switch (id) {
757 case forward_exception_id:
758 case handle_exception_nofpu_id:
759 case handle_exception_id:
760 // Restore the registers that were saved at the beginning.
761 restore_live_registers(sasm, id != handle_exception_nofpu_id);
762 break;
763 case handle_exception_from_callee_id:
764 // WIN64_ONLY: No need to add frame::arg_reg_save_area_bytes to SP
765 // since we do a leave anyway.
766
767 // Pop the return address.
768 __ leave();
769 __ pop(rcx);
770 __ jmp(rcx); // jump to exception handler
771 break;
772 default: ShouldNotReachHere();
773 }
774
775 return oop_maps;
776 }
777
778
779 void Runtime1::generate_unwind_exception(StubAssembler *sasm) {
780 // incoming parameters
781 const Register exception_oop = rax;
782 // callee-saved copy of exception_oop during runtime call
783 const Register exception_oop_callee_saved = NOT_LP64(rsi) LP64_ONLY(r14);
784 // other registers used in this stub
785 const Register exception_pc = rdx;
786 const Register handler_addr = rbx;
787 const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread);
788
789 // verify that only rax, is valid at this time
790 __ invalidate_registers(false, true, true, true, true, true);
791
792 #ifdef ASSERT
793 // check that fields in JavaThread for exception oop and issuing pc are empty
794 NOT_LP64(__ get_thread(thread);)
795 Label oop_empty;
796 __ cmpptr(Address(thread, JavaThread::exception_oop_offset()), 0);
797 __ jcc(Assembler::equal, oop_empty);
798 __ stop("exception oop must be empty");
799 __ bind(oop_empty);
800
801 Label pc_empty;
802 __ cmpptr(Address(thread, JavaThread::exception_pc_offset()), 0);
803 __ jcc(Assembler::equal, pc_empty);
804 __ stop("exception pc must be empty");
805 __ bind(pc_empty);
806 #endif
807
808 // clear the FPU stack in case any FPU results are left behind
809 __ empty_FPU_stack();
810
811 // save exception_oop in callee-saved register to preserve it during runtime calls
812 __ verify_not_null_oop(exception_oop);
813 __ movptr(exception_oop_callee_saved, exception_oop);
814
815 NOT_LP64(__ get_thread(thread);)
816 // Get return address (is on top of stack after leave).
817 __ movptr(exception_pc, Address(rsp, 0));
818
819 // search the exception handler address of the caller (using the return address)
820 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), thread, exception_pc);
821 // rax: exception handler address of the caller
822
823 // Only RAX and RSI are valid at this time, all other registers have been destroyed by the call.
824 __ invalidate_registers(false, true, true, true, false, true);
825
826 // move result of call into correct register
827 __ movptr(handler_addr, rax);
828
829 // Restore exception oop to RAX (required convention of exception handler).
830 __ movptr(exception_oop, exception_oop_callee_saved);
831
832 // verify that there is really a valid exception in rax
833 __ verify_not_null_oop(exception_oop);
834
835 // get throwing pc (= return address).
836 // rdx has been destroyed by the call, so it must be set again
837 // the pop is also necessary to simulate the effect of a ret(0)
838 __ pop(exception_pc);
839
840 // continue at exception handler (return address removed)
841 // note: do *not* remove arguments when unwinding the
842 // activation since the caller assumes having
843 // all arguments on the stack when entering the
844 // runtime to determine the exception handler
845 // (GC happens at call site with arguments!)
846 // rax: exception oop
847 // rdx: throwing pc
848 // rbx: exception handler
849 __ jmp(handler_addr);
850 }
851
852
853 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
854 // use the maximum number of runtime-arguments here because it is difficult to
855 // distinguish each RT-Call.
856 // Note: This number affects also the RT-Call in generate_handle_exception because
857 // the oop-map is shared for all calls.
858 const int num_rt_args = 2; // thread + dummy
859
860 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
861 assert(deopt_blob != NULL, "deoptimization blob must have been created");
862
863 OopMap* oop_map = save_live_registers(sasm, num_rt_args);
864
865 #ifdef _LP64
866 const Register thread = r15_thread;
867 // No need to worry about dummy
868 __ mov(c_rarg0, thread);
869 #else
870 __ push(rax); // push dummy
871
872 const Register thread = rdi; // is callee-saved register (Visual C++ calling conventions)
873 // push java thread (becomes first argument of C function)
874 __ get_thread(thread);
875 __ push(thread);
876 #endif // _LP64
877 __ set_last_Java_frame(thread, noreg, rbp, NULL);
878 // do the call
879 __ call(RuntimeAddress(target));
880 OopMapSet* oop_maps = new OopMapSet();
881 oop_maps->add_gc_map(__ offset(), oop_map);
882 // verify callee-saved register
883 #ifdef ASSERT
884 guarantee(thread != rax, "change this code");
885 __ push(rax);
886 { Label L;
887 __ get_thread(rax);
888 __ cmpptr(thread, rax);
889 __ jcc(Assembler::equal, L);
890 __ stop("StubAssembler::call_RT: rdi/r15 not callee saved?");
891 __ bind(L);
892 }
893 __ pop(rax);
894 #endif
895 __ reset_last_Java_frame(thread, true);
896 #ifndef _LP64
897 __ pop(rcx); // discard thread arg
898 __ pop(rcx); // discard dummy
899 #endif // _LP64
900
901 // check for pending exceptions
902 { Label L;
903 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);
904 __ jcc(Assembler::equal, L);
905 // exception pending => remove activation and forward to exception handler
906
907 __ testptr(rax, rax); // have we deoptimized?
908 __ jump_cc(Assembler::equal,
909 RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id)));
910
911 // the deopt blob expects exceptions in the special fields of
912 // JavaThread, so copy and clear pending exception.
913
914 // load and clear pending exception
915 __ movptr(rax, Address(thread, Thread::pending_exception_offset()));
916 __ movptr(Address(thread, Thread::pending_exception_offset()), NULL_WORD);
917
918 // check that there is really a valid exception
919 __ verify_not_null_oop(rax);
920
921 // load throwing pc: this is the return address of the stub
922 __ movptr(rdx, Address(rsp, return_off * VMRegImpl::stack_slot_size));
923
924 #ifdef ASSERT
925 // check that fields in JavaThread for exception oop and issuing pc are empty
926 Label oop_empty;
927 __ cmpptr(Address(thread, JavaThread::exception_oop_offset()), (int32_t)NULL_WORD);
928 __ jcc(Assembler::equal, oop_empty);
929 __ stop("exception oop must be empty");
930 __ bind(oop_empty);
931
932 Label pc_empty;
933 __ cmpptr(Address(thread, JavaThread::exception_pc_offset()), (int32_t)NULL_WORD);
934 __ jcc(Assembler::equal, pc_empty);
935 __ stop("exception pc must be empty");
936 __ bind(pc_empty);
937 #endif
938
939 // store exception oop and throwing pc to JavaThread
940 __ movptr(Address(thread, JavaThread::exception_oop_offset()), rax);
941 __ movptr(Address(thread, JavaThread::exception_pc_offset()), rdx);
942
943 restore_live_registers(sasm);
944
945 __ leave();
946 __ addptr(rsp, BytesPerWord); // remove return address from stack
947
948 // Forward the exception directly to deopt blob. We can blow no
949 // registers and must leave throwing pc on the stack. A patch may
950 // have values live in registers so the entry point with the
951 // exception in tls.
952 __ jump(RuntimeAddress(deopt_blob->unpack_with_exception_in_tls()));
953
954 __ bind(L);
955 }
956
957
958 // Runtime will return true if the nmethod has been deoptimized during
959 // the patching process. In that case we must do a deopt reexecute instead.
960
961 Label cont;
962
963 __ testptr(rax, rax); // have we deoptimized?
964 __ jcc(Assembler::equal, cont); // no
965
966 // Will reexecute. Proper return address is already on the stack we just restore
967 // registers, pop all of our frame but the return address and jump to the deopt blob
968 restore_live_registers(sasm);
969 __ leave();
970 __ jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
971
972 __ bind(cont);
973 restore_live_registers(sasm);
974 __ leave();
975 __ ret(0);
976
977 return oop_maps;
978 }
979
980
981 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
982
983 // for better readability
984 const bool must_gc_arguments = true;
985 const bool dont_gc_arguments = false;
986
987 // default value; overwritten for some optimized stubs that are called from methods that do not use the fpu
988 bool save_fpu_registers = true;
989
990 // stub code & info for the different stubs
991 OopMapSet* oop_maps = NULL;
992 switch (id) {
993 case forward_exception_id:
994 {
995 oop_maps = generate_handle_exception(id, sasm);
996 __ leave();
997 __ ret(0);
998 }
999 break;
1000
1001 case new_instance_id:
1002 case fast_new_instance_id:
1003 case fast_new_instance_init_check_id:
1004 {
1005 Register klass = rdx; // Incoming
1006 Register obj = rax; // Result
1007
1008 if (id == new_instance_id) {
1009 __ set_info("new_instance", dont_gc_arguments);
1010 } else if (id == fast_new_instance_id) {
1011 __ set_info("fast new_instance", dont_gc_arguments);
1012 } else {
1013 assert(id == fast_new_instance_init_check_id, "bad StubID");
1014 __ set_info("fast new_instance init check", dont_gc_arguments);
1015 }
1016
1017 // If TLAB is disabled, see if there is support for inlining contiguous
1018 // allocations.
1019 // Otherwise, just go to the slow path.
1020 if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) && !UseTLAB
1021 && Universe::heap()->supports_inline_contig_alloc()) {
1022 Label slow_path;
1023 Register obj_size = rcx;
1024 Register t1 = rbx;
1025 Register t2 = rsi;
1026 assert_different_registers(klass, obj, obj_size, t1, t2);
1027
1028 __ push(rdi);
1029 __ push(rbx);
1030
1031 if (id == fast_new_instance_init_check_id) {
1032 // make sure the klass is initialized
1033 __ cmpb(Address(klass, InstanceKlass::init_state_offset()), InstanceKlass::fully_initialized);
1034 __ jcc(Assembler::notEqual, slow_path);
1035 }
1036
1037 #ifdef ASSERT
1038 // assert object can be fast path allocated
1039 {
1040 Label ok, not_ok;
1041 __ movl(obj_size, Address(klass, Klass::layout_helper_offset()));
1042 __ cmpl(obj_size, 0); // make sure it's an instance (LH > 0)
1043 __ jcc(Assembler::lessEqual, not_ok);
1044 __ testl(obj_size, Klass::_lh_instance_slow_path_bit);
1045 __ jcc(Assembler::zero, ok);
1046 __ bind(not_ok);
1047 __ stop("assert(can be fast path allocated)");
1048 __ should_not_reach_here();
1049 __ bind(ok);
1050 }
1051 #endif // ASSERT
1052
1053 const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread);
1054 NOT_LP64(__ get_thread(thread));
1055
1056 // get the instance size (size is postive so movl is fine for 64bit)
1057 __ movl(obj_size, Address(klass, Klass::layout_helper_offset()));
1058
1059 __ eden_allocate(thread, obj, obj_size, 0, t1, slow_path);
1060
1061 __ initialize_object(obj, klass, obj_size, 0, t1, t2, /* is_tlab_allocated */ false);
1062 __ verify_oop(obj);
1063 __ pop(rbx);
1064 __ pop(rdi);
1065 __ ret(0);
1066
1067 __ bind(slow_path);
1068 __ pop(rbx);
1069 __ pop(rdi);
1070 }
1071
1072 __ enter();
1073 OopMap* map = save_live_registers(sasm, 2);
1074 int call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_instance), klass);
1075 oop_maps = new OopMapSet();
1076 oop_maps->add_gc_map(call_offset, map);
1077 restore_live_registers_except_rax(sasm);
1078 __ verify_oop(obj);
1079 __ leave();
1080 __ ret(0);
1081
1082 // rax,: new instance
1083 }
1084
1085 break;
1086
1087 case counter_overflow_id:
1088 {
1089 Register bci = rax, method = rbx;
1090 __ enter();
1091 OopMap* map = save_live_registers(sasm, 3);
1092 // Retrieve bci
1093 __ movl(bci, Address(rbp, 2*BytesPerWord));
1094 // And a pointer to the Method*
1095 __ movptr(method, Address(rbp, 3*BytesPerWord));
1096 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, counter_overflow), bci, method);
1097 oop_maps = new OopMapSet();
1098 oop_maps->add_gc_map(call_offset, map);
1099 restore_live_registers(sasm);
1100 __ leave();
1101 __ ret(0);
1102 }
1103 break;
1104
1105 case new_type_array_id:
1106 case new_object_array_id:
1107 case new_value_array_id:
1108 {
1109 Register length = rbx; // Incoming
1110 Register klass = rdx; // Incoming
1111 Register obj = rax; // Result
1112
1113 if (id == new_type_array_id) {
1114 __ set_info("new_type_array", dont_gc_arguments);
1115 } else if (id == new_object_array_id) {
1116 __ set_info("new_object_array", dont_gc_arguments);
1117 } else {
1118 __ set_info("new_value_array", dont_gc_arguments);
1119 }
1120
1121 #ifdef ASSERT
1122 // assert object type is really an array of the proper kind
1123 {
1124 Label ok;
1125 Register t0 = obj;
1126 __ movl(t0, Address(klass, Klass::layout_helper_offset()));
1127 __ sarl(t0, Klass::_lh_array_tag_shift);
1128 switch (id) {
1129 case new_type_array_id:
1130 __ cmpl(t0, Klass::_lh_array_tag_type_value);
1131 __ jcc(Assembler::equal, ok);
1132 __ stop("assert(is a type array klass)");
1133 break;
1134 case new_object_array_id:
1135 __ cmpl(t0, Klass::_lh_array_tag_obj_value); // new "[Ljava/lang/Object;"
1136 __ jcc(Assembler::equal, ok);
1137 __ cmpl(t0, Klass::_lh_array_tag_vt_value); // new "[LVT;"
1138 __ jcc(Assembler::equal, ok);
1139 __ stop("assert(is an object or value array klass)");
1140 break;
1141 case new_value_array_id:
1142 // new "[QVT;"
1143 __ cmpl(t0, Klass::_lh_array_tag_vt_value); // the array can be flattened.
1144 __ jcc(Assembler::equal, ok);
1145 __ cmpl(t0, Klass::_lh_array_tag_obj_value); // the array cannot be flattened (due to ValueArrayElemMaxFlatSize, etc)
1146 __ jcc(Assembler::equal, ok);
1147 __ stop("assert(is an object or value array klass)");
1148 break;
1149 default: ShouldNotReachHere();
1150 }
1151 __ should_not_reach_here();
1152 __ bind(ok);
1153 }
1154 #endif // ASSERT
1155
1156 // If TLAB is disabled, see if there is support for inlining contiguous
1157 // allocations.
1158 // Otherwise, just go to the slow path.
1159 if (!UseTLAB && Universe::heap()->supports_inline_contig_alloc()) {
1160 Register arr_size = rsi;
1161 Register t1 = rcx; // must be rcx for use as shift count
1162 Register t2 = rdi;
1163 Label slow_path;
1164
1165 // get the allocation size: round_up(hdr + length << (layout_helper & 0x1F))
1166 // since size is positive movl does right thing on 64bit
1167 __ movl(t1, Address(klass, Klass::layout_helper_offset()));
1168 // since size is postive movl does right thing on 64bit
1169 __ movl(arr_size, length);
1170 assert(t1 == rcx, "fixed register usage");
1171 __ shlptr(arr_size /* by t1=rcx, mod 32 */);
1172 __ shrptr(t1, Klass::_lh_header_size_shift);
1173 __ andptr(t1, Klass::_lh_header_size_mask);
1174 __ addptr(arr_size, t1);
1175 __ addptr(arr_size, MinObjAlignmentInBytesMask); // align up
1176 __ andptr(arr_size, ~MinObjAlignmentInBytesMask);
1177
1178 // Using t2 for non 64-bit.
1179 const Register thread = NOT_LP64(t2) LP64_ONLY(r15_thread);
1180 NOT_LP64(__ get_thread(thread));
1181 __ eden_allocate(thread, obj, arr_size, 0, t1, slow_path); // preserves arr_size
1182
1183 __ initialize_header(obj, klass, length, t1, t2);
1184 __ movb(t1, Address(klass, in_bytes(Klass::layout_helper_offset()) + (Klass::_lh_header_size_shift / BitsPerByte)));
1185 assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise");
1186 assert(Klass::_lh_header_size_mask <= 0xFF, "bytewise");
1187 __ andptr(t1, Klass::_lh_header_size_mask);
1188 __ subptr(arr_size, t1); // body length
1189 __ addptr(t1, obj); // body start
1190 __ initialize_body(t1, arr_size, 0, t2);
1191 __ verify_oop(obj);
1192 __ ret(0);
1193
1194 __ bind(slow_path);
1195 }
1196
1197 __ enter();
1198 OopMap* map = save_live_registers(sasm, 3);
1199 int call_offset;
1200 if (id == new_type_array_id) {
1201 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_type_array), klass, length);
1202 } else if (id == new_object_array_id) {
1203 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_object_array), klass, length);
1204 } else {
1205 assert(id == new_value_array_id, "must be");
1206 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_value_array), klass, length);
1207 }
1208
1209 oop_maps = new OopMapSet();
1210 oop_maps->add_gc_map(call_offset, map);
1211 restore_live_registers_except_rax(sasm);
1212
1213 __ verify_oop(obj);
1214 __ leave();
1215 __ ret(0);
1216
1217 // rax,: new array
1218 }
1219 break;
1220
1221 case new_multi_array_id:
1222 { StubFrame f(sasm, "new_multi_array", dont_gc_arguments);
1223 // rax,: klass
1224 // rbx,: rank
1225 // rcx: address of 1st dimension
1226 OopMap* map = save_live_registers(sasm, 4);
1227 int call_offset = __ call_RT(rax, noreg, CAST_FROM_FN_PTR(address, new_multi_array), rax, rbx, rcx);
1228
1229 oop_maps = new OopMapSet();
1230 oop_maps->add_gc_map(call_offset, map);
1231 restore_live_registers_except_rax(sasm);
1232
1233 // rax,: new multi array
1234 __ verify_oop(rax);
1235 }
1236 break;
1237
1238 case load_flattened_array_id:
1239 {
1240 StubFrame f(sasm, "load_flattened_array", dont_gc_arguments);
1241 OopMap* map = save_live_registers(sasm, 3);
1242
1243 // Called with store_parameter and not C abi
1244
1245 f.load_argument(1, rax); // rax,: array
1246 f.load_argument(0, rbx); // rbx,: index
1247 int call_offset = __ call_RT(rax, noreg, CAST_FROM_FN_PTR(address, load_flattened_array), rax, rbx);
1248
1249 oop_maps = new OopMapSet();
1250 oop_maps->add_gc_map(call_offset, map);
1251 restore_live_registers_except_rax(sasm);
1252
1253 // rax,: loaded element at array[index]
1254 __ verify_oop(rax);
1255 }
1256 break;
1257
1258 case store_flattened_array_id:
1259 {
1260 StubFrame f(sasm, "store_flattened_array", dont_gc_arguments);
1261 OopMap* map = save_live_registers(sasm, 4);
1262
1263 // Called with store_parameter and not C abi
1264
1265 f.load_argument(2, rax); // rax,: array
1266 f.load_argument(1, rbx); // rbx,: index
1267 f.load_argument(0, rcx); // rcx,: value
1268 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, store_flattened_array), rax, rbx, rcx);
1269
1270 oop_maps = new OopMapSet();
1271 oop_maps->add_gc_map(call_offset, map);
1272 restore_live_registers_except_rax(sasm);
1273 }
1274 break;
1275
1276 case substitutability_check_id:
1277 {
1278 StubFrame f(sasm, "substitutability_check", dont_gc_arguments);
1279 OopMap* map = save_live_registers(sasm, 3);
1280
1281 // Called with store_parameter and not C abi
1282
1283 f.load_argument(1, rax); // rax,: left
1284 f.load_argument(0, rbx); // rbx,: right
1285 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, substitutability_check), rax, rbx);
1286
1287 oop_maps = new OopMapSet();
1288 oop_maps->add_gc_map(call_offset, map);
1289 restore_live_registers_except_rax(sasm);
1290
1291 // rax,: are the two operands substitutable
1292 }
1293 break;
1294
1295
1296 case buffer_value_args_id:
1297 case buffer_value_args_no_receiver_id:
1298 {
1299 const char* name = (id == buffer_value_args_id) ?
1300 "buffer_value_args" : "buffer_value_args_no_receiver";
1301 StubFrame f(sasm, name, dont_gc_arguments);
1302 OopMap* map = save_live_registers(sasm, 2);
1303 Register method = rbx;
1304 address entry = (id == buffer_value_args_id) ?
1305 CAST_FROM_FN_PTR(address, buffer_value_args) :
1306 CAST_FROM_FN_PTR(address, buffer_value_args_no_receiver);
1307 int call_offset = __ call_RT(rax, noreg, entry, method);
1308 oop_maps = new OopMapSet();
1309 oop_maps->add_gc_map(call_offset, map);
1310 restore_live_registers_except_rax(sasm);
1311 __ verify_oop(rax); // rax: an array of buffered value objects
1312 }
1313 break;
1314
1315 case register_finalizer_id:
1316 {
1317 __ set_info("register_finalizer", dont_gc_arguments);
1318
1319 // This is called via call_runtime so the arguments
1320 // will be place in C abi locations
1321
1322 #ifdef _LP64
1323 __ verify_oop(c_rarg0);
1324 __ mov(rax, c_rarg0);
1325 #else
1326 // The object is passed on the stack and we haven't pushed a
1327 // frame yet so it's one work away from top of stack.
1328 __ movptr(rax, Address(rsp, 1 * BytesPerWord));
1329 __ verify_oop(rax);
1330 #endif // _LP64
1331
1332 // load the klass and check the has finalizer flag
1333 Label register_finalizer;
1334 Register t = rsi;
1335 __ load_klass(t, rax);
1336 __ movl(t, Address(t, Klass::access_flags_offset()));
1337 __ testl(t, JVM_ACC_HAS_FINALIZER);
1338 __ jcc(Assembler::notZero, register_finalizer);
1339 __ ret(0);
1340
1341 __ bind(register_finalizer);
1342 __ enter();
1343 OopMap* oop_map = save_live_registers(sasm, 2 /*num_rt_args */);
1344 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), rax);
1345 oop_maps = new OopMapSet();
1346 oop_maps->add_gc_map(call_offset, oop_map);
1347
1348 // Now restore all the live registers
1349 restore_live_registers(sasm);
1350
1351 __ leave();
1352 __ ret(0);
1353 }
1354 break;
1355
1356 case throw_range_check_failed_id:
1357 { StubFrame f(sasm, "range_check_failed", dont_gc_arguments);
1358 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true);
1359 }
1360 break;
1361
1362 case throw_index_exception_id:
1363 { StubFrame f(sasm, "index_range_check_failed", dont_gc_arguments);
1364 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
1365 }
1366 break;
1367
1368 case throw_div0_exception_id:
1369 { StubFrame f(sasm, "throw_div0_exception", dont_gc_arguments);
1370 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
1371 }
1372 break;
1373
1374 case throw_null_pointer_exception_id:
1375 { StubFrame f(sasm, "throw_null_pointer_exception", dont_gc_arguments);
1376 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
1377 }
1378 break;
1379
1380 case handle_exception_nofpu_id:
1381 case handle_exception_id:
1382 { StubFrame f(sasm, "handle_exception", dont_gc_arguments);
1383 oop_maps = generate_handle_exception(id, sasm);
1384 }
1385 break;
1386
1387 case handle_exception_from_callee_id:
1388 { StubFrame f(sasm, "handle_exception_from_callee", dont_gc_arguments);
1389 oop_maps = generate_handle_exception(id, sasm);
1390 }
1391 break;
1392
1393 case unwind_exception_id:
1394 { __ set_info("unwind_exception", dont_gc_arguments);
1395 // note: no stubframe since we are about to leave the current
1396 // activation and we are calling a leaf VM function only.
1397 generate_unwind_exception(sasm);
1398 }
1399 break;
1400
1401 case throw_array_store_exception_id:
1402 { StubFrame f(sasm, "throw_array_store_exception", dont_gc_arguments);
1403 // tos + 0: link
1404 // + 1: return address
1405 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
1406 }
1407 break;
1408
1409 case throw_class_cast_exception_id:
1410 { StubFrame f(sasm, "throw_class_cast_exception", dont_gc_arguments);
1411 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
1412 }
1413 break;
1414
1415 case throw_incompatible_class_change_error_id:
1416 { StubFrame f(sasm, "throw_incompatible_class_change_error", dont_gc_arguments);
1417 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
1418 }
1419 break;
1420
1421 case throw_illegal_monitor_state_exception_id:
1422 { StubFrame f(sasm, "throw_illegal_monitor_state_exception", dont_gc_arguments);
1423 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_illegal_monitor_state_exception), false);
1424 }
1425 break;
1426
1427 case slow_subtype_check_id:
1428 {
1429 // Typical calling sequence:
1430 // __ push(klass_RInfo); // object klass or other subclass
1431 // __ push(sup_k_RInfo); // array element klass or other superclass
1432 // __ call(slow_subtype_check);
1433 // Note that the subclass is pushed first, and is therefore deepest.
1434 // Previous versions of this code reversed the names 'sub' and 'super'.
1435 // This was operationally harmless but made the code unreadable.
1436 enum layout {
1437 rax_off, SLOT2(raxH_off)
1438 rcx_off, SLOT2(rcxH_off)
1439 rsi_off, SLOT2(rsiH_off)
1440 rdi_off, SLOT2(rdiH_off)
1441 // saved_rbp_off, SLOT2(saved_rbpH_off)
1442 return_off, SLOT2(returnH_off)
1443 sup_k_off, SLOT2(sup_kH_off)
1444 klass_off, SLOT2(superH_off)
1445 framesize,
1446 result_off = klass_off // deepest argument is also the return value
1447 };
1448
1449 __ set_info("slow_subtype_check", dont_gc_arguments);
1450 __ push(rdi);
1451 __ push(rsi);
1452 __ push(rcx);
1453 __ push(rax);
1454
1455 // This is called by pushing args and not with C abi
1456 __ movptr(rsi, Address(rsp, (klass_off) * VMRegImpl::stack_slot_size)); // subclass
1457 __ movptr(rax, Address(rsp, (sup_k_off) * VMRegImpl::stack_slot_size)); // superclass
1458
1459 Label miss;
1460 __ check_klass_subtype_slow_path(rsi, rax, rcx, rdi, NULL, &miss);
1461
1462 // fallthrough on success:
1463 __ movptr(Address(rsp, (result_off) * VMRegImpl::stack_slot_size), 1); // result
1464 __ pop(rax);
1465 __ pop(rcx);
1466 __ pop(rsi);
1467 __ pop(rdi);
1468 __ ret(0);
1469
1470 __ bind(miss);
1471 __ movptr(Address(rsp, (result_off) * VMRegImpl::stack_slot_size), NULL_WORD); // result
1472 __ pop(rax);
1473 __ pop(rcx);
1474 __ pop(rsi);
1475 __ pop(rdi);
1476 __ ret(0);
1477 }
1478 break;
1479
1480 case monitorenter_nofpu_id:
1481 save_fpu_registers = false;
1482 // fall through
1483 case monitorenter_id:
1484 {
1485 StubFrame f(sasm, "monitorenter", dont_gc_arguments);
1486 OopMap* map = save_live_registers(sasm, 3, save_fpu_registers);
1487
1488 // Called with store_parameter and not C abi
1489
1490 f.load_argument(1, rax); // rax,: object
1491 f.load_argument(0, rbx); // rbx,: lock address
1492
1493 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), rax, rbx);
1494
1495 oop_maps = new OopMapSet();
1496 oop_maps->add_gc_map(call_offset, map);
1497 restore_live_registers(sasm, save_fpu_registers);
1498 }
1499 break;
1500
1501 case monitorexit_nofpu_id:
1502 save_fpu_registers = false;
1503 // fall through
1504 case monitorexit_id:
1505 {
1506 StubFrame f(sasm, "monitorexit", dont_gc_arguments);
1507 OopMap* map = save_live_registers(sasm, 2, save_fpu_registers);
1508
1509 // Called with store_parameter and not C abi
1510
1511 f.load_argument(0, rax); // rax,: lock address
1512
1513 // note: really a leaf routine but must setup last java sp
1514 // => use call_RT for now (speed can be improved by
1515 // doing last java sp setup manually)
1516 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), rax);
1517
1518 oop_maps = new OopMapSet();
1519 oop_maps->add_gc_map(call_offset, map);
1520 restore_live_registers(sasm, save_fpu_registers);
1521 }
1522 break;
1523
1524 case deoptimize_id:
1525 {
1526 StubFrame f(sasm, "deoptimize", dont_gc_arguments);
1527 const int num_rt_args = 2; // thread, trap_request
1528 OopMap* oop_map = save_live_registers(sasm, num_rt_args);
1529 f.load_argument(0, rax);
1530 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize), rax);
1531 oop_maps = new OopMapSet();
1532 oop_maps->add_gc_map(call_offset, oop_map);
1533 restore_live_registers(sasm);
1534 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
1535 assert(deopt_blob != NULL, "deoptimization blob must have been created");
1536 __ leave();
1537 __ jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
1538 }
1539 break;
1540
1541 case access_field_patching_id:
1542 { StubFrame f(sasm, "access_field_patching", dont_gc_arguments);
1543 // we should set up register map
1544 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
1545 }
1546 break;
1547
1548 case load_klass_patching_id:
1549 { StubFrame f(sasm, "load_klass_patching", dont_gc_arguments);
1550 // we should set up register map
1551 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
1552 }
1553 break;
1554
1555 case load_mirror_patching_id:
1556 { StubFrame f(sasm, "load_mirror_patching", dont_gc_arguments);
1557 // we should set up register map
1558 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
1559 }
1560 break;
1561
1562 case load_appendix_patching_id:
1563 { StubFrame f(sasm, "load_appendix_patching", dont_gc_arguments);
1564 // we should set up register map
1565 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
1566 }
1567 break;
1568
1569 case dtrace_object_alloc_id:
1570 { // rax,: object
1571 StubFrame f(sasm, "dtrace_object_alloc", dont_gc_arguments);
1572 // we can't gc here so skip the oopmap but make sure that all
1573 // the live registers get saved.
1574 save_live_registers(sasm, 1);
1575
1576 __ NOT_LP64(push(rax)) LP64_ONLY(mov(c_rarg0, rax));
1577 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc)));
1578 NOT_LP64(__ pop(rax));
1579
1580 restore_live_registers(sasm);
1581 }
1582 break;
1583
1584 case fpu2long_stub_id:
1585 {
1586 // rax, and rdx are destroyed, but should be free since the result is returned there
1587 // preserve rsi,ecx
1588 __ push(rsi);
1589 __ push(rcx);
1590 LP64_ONLY(__ push(rdx);)
1591
1592 // check for NaN
1593 Label return0, do_return, return_min_jlong, do_convert;
1594
1595 Address value_high_word(rsp, wordSize + 4);
1596 Address value_low_word(rsp, wordSize);
1597 Address result_high_word(rsp, 3*wordSize + 4);
1598 Address result_low_word(rsp, 3*wordSize);
1599
1600 __ subptr(rsp, 32); // more than enough on 32bit
1601 __ fst_d(value_low_word);
1602 __ movl(rax, value_high_word);
1603 __ andl(rax, 0x7ff00000);
1604 __ cmpl(rax, 0x7ff00000);
1605 __ jcc(Assembler::notEqual, do_convert);
1606 __ movl(rax, value_high_word);
1607 __ andl(rax, 0xfffff);
1608 __ orl(rax, value_low_word);
1609 __ jcc(Assembler::notZero, return0);
1610
1611 __ bind(do_convert);
1612 __ fnstcw(Address(rsp, 0));
1613 __ movzwl(rax, Address(rsp, 0));
1614 __ orl(rax, 0xc00);
1615 __ movw(Address(rsp, 2), rax);
1616 __ fldcw(Address(rsp, 2));
1617 __ fwait();
1618 __ fistp_d(result_low_word);
1619 __ fldcw(Address(rsp, 0));
1620 __ fwait();
1621 // This gets the entire long in rax on 64bit
1622 __ movptr(rax, result_low_word);
1623 // testing of high bits
1624 __ movl(rdx, result_high_word);
1625 __ mov(rcx, rax);
1626 // What the heck is the point of the next instruction???
1627 __ xorl(rcx, 0x0);
1628 __ movl(rsi, 0x80000000);
1629 __ xorl(rsi, rdx);
1630 __ orl(rcx, rsi);
1631 __ jcc(Assembler::notEqual, do_return);
1632 __ fldz();
1633 __ fcomp_d(value_low_word);
1634 __ fnstsw_ax();
1635 #ifdef _LP64
1636 __ testl(rax, 0x4100); // ZF & CF == 0
1637 __ jcc(Assembler::equal, return_min_jlong);
1638 #else
1639 __ sahf();
1640 __ jcc(Assembler::above, return_min_jlong);
1641 #endif // _LP64
1642 // return max_jlong
1643 #ifndef _LP64
1644 __ movl(rdx, 0x7fffffff);
1645 __ movl(rax, 0xffffffff);
1646 #else
1647 __ mov64(rax, CONST64(0x7fffffffffffffff));
1648 #endif // _LP64
1649 __ jmp(do_return);
1650
1651 __ bind(return_min_jlong);
1652 #ifndef _LP64
1653 __ movl(rdx, 0x80000000);
1654 __ xorl(rax, rax);
1655 #else
1656 __ mov64(rax, UCONST64(0x8000000000000000));
1657 #endif // _LP64
1658 __ jmp(do_return);
1659
1660 __ bind(return0);
1661 __ fpop();
1662 #ifndef _LP64
1663 __ xorptr(rdx,rdx);
1664 __ xorptr(rax,rax);
1665 #else
1666 __ xorptr(rax, rax);
1667 #endif // _LP64
1668
1669 __ bind(do_return);
1670 __ addptr(rsp, 32);
1671 LP64_ONLY(__ pop(rdx);)
1672 __ pop(rcx);
1673 __ pop(rsi);
1674 __ ret(0);
1675 }
1676 break;
1677
1678 case predicate_failed_trap_id:
1679 {
1680 StubFrame f(sasm, "predicate_failed_trap", dont_gc_arguments);
1681
1682 OopMap* map = save_live_registers(sasm, 1);
1683
1684 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
1685 oop_maps = new OopMapSet();
1686 oop_maps->add_gc_map(call_offset, map);
1687 restore_live_registers(sasm);
1688 __ leave();
1689 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
1690 assert(deopt_blob != NULL, "deoptimization blob must have been created");
1691
1692 __ jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
1693 }
1694 break;
1695
1696 default:
1697 { StubFrame f(sasm, "unimplemented entry", dont_gc_arguments);
1698 __ movptr(rax, (int)id);
1699 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), rax);
1700 __ should_not_reach_here();
1701 }
1702 break;
1703 }
1704 return oop_maps;
1705 }
1706
1707 #undef __
1708
1709 const char *Runtime1::pd_name_for_address(address entry) {
1710 return "<unknown function>";
1711 }